Special Reinforced Concrete Shear Walls

The design and detailing requirements for special reinforced concrete shear walls have undergone significant changes from aci 318 11 to aci 318 14.

Special reinforced concrete shear walls.

In reinforced concrete buildings the vertical elements are usually either moment resisting frames or structural walls sometimes referred to as shear walls. Figure 1 reinforced concrete shear wall geometry and loading. A structural reinforced concrete shear wall in a 5 story building provides lateral and gravity load resistance for the applied load as shown in the figure below. 2 1 use of special reinforced masonry shear walls masonry walls proportioned to resist a combination of shear flexural and axial forces are referred to as structural walls.

Shear wall section and assumed reinforcement is investigated after analysis to verify suitability for the applied loads. The requirements of this section apply to special reinforced concrete structural walls serving as part of the earthquake force resisting system. Based on aci 18 10 4 1 nominal shear strength v n of structural walls is not to exceed vn acv c f c t fy where c is a coefficient defining the relative contribution of concrete strength to wall strength given as follows. When the primary function of structural walls is to resist in plane loads conveyed from diaphragms down to the foundation they are generally referred to as shear walls.

The changes are a result of the unsatisfactory performance of many shear walls in the chile earthquake of 2010 and the christchurch new zealand earthquake of 2011. C 0 80 for hw. Shear wall section and assumed reinforcement is investigated after analysis to verify suitability for the applied loads.